[CAUSEWAY-1339] Simplify/unify session and xactn management for Wicket viewer and RO viewer

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.11.1
• Fix Version/s: 2.0.0-M3
• Component/s: Core, Viewer RO, Viewer Wicket
• Assignee: Unassigned
• Reporter: Daniel Keir Haywood
• Created: 21/Mar/16 07:36
• Updated: 19/Mar/20 17:27
• Resolved: 19/Mar/20 17:27

Description

Move the responsibility for session management / xactn mgmt out into a filter, and remove corresponding functionality within Wicket viewer's RequestCycle.

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in a little more detail:

move bootstrapping out of IsisWicketApplication and into IsisWebAppBootstrapper

• by filters (pick up from ServletRequest)
• replace by binding IsisSessionFactory
• final IsisSystem system = (IsisSystem) servletContext.getAttribute(WebAppConstants.ISIS_SYSTEM_KEY);

• from RO viewer (pick up from ServletRequest)

• from at least some of the Wicket viewer (top-level application stuff, WebRequestCycle etc,... pick up from ServletRequest)

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also:
remove WebAppConstants.HTTP_SESSION_LOGGED_ON_PREVIOUSLY_USING_LOGON_FIXTURE_KEY and LogonFixture, since not currently supported and no-one has missed it.